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Evaluation of the Stoichiometry between PtCl 6 2− and TOA + Ions during the Liquid/Liquid Extraction
Author(s) -
Wu Shu,
Nguyen Linh,
Dang Jenny,
Liang Kevin,
Dail Christopher,
Henriquez Brenda,
Huynh Quyen T.,
Dinh Uyen N.,
Liang Yuhao,
Anz Samir,
Sun Peng
Publication year - 2018
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201800412
Subject(s) - stoichiometry , liquid liquid , phase (matter) , analytical chemistry (journal) , ion , extraction (chemistry) , liquid–liquid extraction , aqueous two phase system , aqueous solution , materials science , chemistry , chromatography , organic chemistry
The transfer of PtCl 6 2− ions into the organic phase facilitated by TOA + is the very first step in the Brust‐Schiffrin (BS) two‐phase synthesis of monolayer protected Pt nanoparticles. However, the stoichiometry between TOA + and PtCl 6 2− during the facilitated transfer process is still unknown. In this paper, a hemispherical micro‐liquid/liquid interface, which is formed between a PtCl 6 2− aqueous filled micropipette and an organic phase, has been employed to study the stoichiometry of TOA + facilitated transfer of PtCl 6 2− . Due to the even diffusion field at the hemispherical micro‐liquid/liquid interface, the theoretical i‐V curve for TOA + facilitated transfer of PtCl 6 2− can be derived in a simple way. By simulating the theoretical i‐V curve to the experimental voltammogram, the stoichiometry of TOA + facilitated transfer of PtCl 6 2− was evaluated to be 8.